turf - npm Package Compare versions

Comparing version 0.0.84 to 0.0.86

index.js

 module.exports = {
+  variance: require('./lib/variance'),
   deviation: require('./lib/deviation'),
@@ -3,0 +4,0 @@ median: require('./lib/median'),

lib/aggregate.js

@@ -9,2 +9,3 @@ var _ = require('lodash')
 t.deviation = require('./deviation')
+t.variance = require('./variance')
 
@@ -44,2 +45,7 @@ module.exports = function(polygons, points, aggregations, done){
         break
+      case 'variance':
+        t.variance(polygons, points, agg.inField, agg.outField, function(err, varianced){
+          polygons = varianced
+        })
+        break
       default:
@@ -46,0 +52,0 @@ done(new Error('"'+agg.aggregation +'" is not a recognized aggregation operation.'))

package.json

 {
   "name": "turf",
-  "version": "0.0.84",
+  "version": "0.0.86",
   "description": "a node.js library for performing geospatial operations with geojson",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -73,2 +73,3 @@ turf
 - [deviation](#deviation)
+- [variance](#variance)
 - [aggregate](#aggregate)
@@ -844,2 +845,28 @@ - [union](#union)
 
+###variance
+
+Calculates the standard deviation value of a field for points within a set of polygons.
+
+```javascript
+var t = require('turf')
+
+var poly1 = t.polygon([[[0,0],[10,0],[10,10], [0,10]]])
+var poly2 = t.polygon([[[10,0],[20,10],[20,20], [20,0]]])
+var polyFC = t.featurecollection([poly1, poly2])
+var pt1 = t.point(1,1, {population: 500})
+var pt2 = t.point(1,3, {population: 400})
+var pt3 = t.point(14,2, {population: 600})
+var pt4 = t.point(13,1, {population: 500})
+var pt5 = t.point(19,7, {population: 200})
+var ptFC = t.featurecollection([pt1, pt2, pt3, pt4, pt5])
+
+t.variance(polyFC, ptFC, 'population', 'pop_variance', function(err, varianced){
+  if(err) throw err
+
+  console.log(varianced.features[0].properties.pop_variance)
+  console.log(varianced.features[1].properties.pop_variance)
+})
+```
+
+
 ###aggregate
@@ -891,2 +918,7 @@
     outField: 'pop_deviation'
+  },
+  {
+    aggregation: 'variance',
+    inField: 'population',
+    outField: 'pop_variance'
   }
@@ -893,0 +925,0 @@ ]

test/aggregate.js

@@ -45,2 +45,7 @@ var t = require('../index'),
         outField: 'pop_deviation'
+      },
+      {
+        aggregation: 'variance',
+        inField: 'population',
+        outField: 'pop_variance'
       }
@@ -65,2 +70,4 @@ ]
       polys.features[1].properties.pop_deviation.should.be.ok
+      polys.features[0].properties.pop_variance.should.be.ok
+      polys.features[1].properties.pop_variance.should.be.ok
       done()
@@ -67,0 +74,0 @@ })

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Improved metrics

Total package byte prevSize

3464087

increased by0.14%

Number of package files

226

increased by0.89%

Lines of code

21727

increased by0.4%

Number of lines in readme file

975

increased by3.39%

No dependency changes